The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 1991
Filed:
Feb. 01, 1990
Applicant:
Inventor:
Jan Feijen, Oude Grensweg, NL;
Assignee:
Theratech, Inc., Salt Lake City, UT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A61K / ; A61E / ;
U.S. Cl.
CPC ...
424484 ; 424423 ; 424426 ; 424488 ; 424499 ; 424450 ; 514937 ;
Abstract
A biodegradable hydrogel matrix is provided, useful for the controlled release of pharmacologically active agents. The matrix is formed by cross-linking a proteinaceous component and a polysaccharide or mucopolysaccharide, and then loading a selected drug therein. By varying temperature, ionic strength, and the composition of the hydrogel matrix, one can control degradation kinetics, the degree of uptake of a particular pharmacologically active agent, and the overall times release profile.